//
//  AppDelegate.m
//  07-UITabBarController
//
//  Created by 曹曹 on 16/7/22.
//  Copyright © 2016年 曹曹. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    _window.backgroundColor = [UIColor whiteColor];
    [_window makeKeyAndVisible];
    // UITabBarController 标签视图控制器
    // 主要管理没有层级关系的视图控制器
    // 1.ViewControllers 所有被管理的视图控制器都在这个数组中
    // 2.可以通过setter方法赋值, 也可以通过下述方法进行视图控制器数组的赋值
    // setViewControllers: animated:
    // 3.通过一个数组完成创建后, 如果数组中的控制器没有设置tabBarItem, 则显示一个空的tabBarItem
    // 4.tabBarItem 根据自己需求去创建对应得tabBarItem
    // tabBarItem 是 ViewController 的属性(Category)
    // 因为: 每个视图控制器的tabBarItem都不一样, 因此不能设为tabBarItem的属性
#warning tabBarItem init
    // 1>.initWithTabBarSystemItem:tag:根据系统样式创建
    // 2>.initWithTitle:image:tag:根据自定义的图片与文字创建
    // 3>.initWithTitle:image:selectedImage:根据自定义的图片与文字创建, 增添选中时的图片
    // 5.如果数组个数过多(多于5个时), 系统会把多余出来的内容, 统一使用一种方式去管理
    // 建议: 数组个数不要大于5
    // 6.tabBar(高度49)
    // 1>.barTintColor bar的背景颜色
    // 2>.tintColor bar上选中元素的颜色
    // 3>.translucent bar是否透明
    // 4>.badgeValue bar的角标
    // 7.UIAppearance 全局设置
    [[UITabBar appearance] setTintColor:[UIColor whiteColor]];
    [[UITabBar appearance] setBarTintColor:[UIColor blackColor]];
    [[UINavigationBar appearance] setBarTintColor:[UIColor redColor]];
#warning 修改系统标题颜色 navigationBar.title.color
    // 1.自定义一个titleView, 放一个label, 修改字体颜色
    // 2.方法如下:
    [[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
    // 在VC中, self.title 与 self.navigationItem.title 的区别
    // 1.self.title 会修改两个内容: navigationItem.title 和 tabBarItem.title
    // 2.self.navigationItem.title 只修改 navigationBar上的标题
    UITabBarController *tabBar = [[UITabBarController alloc] init];
    ViewController *vc1 = [[ViewController alloc] init];
    UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:vc1];
    // 距离tabBar最近的控制器是navigationController
    // 使用navigationController去修改tabBarItem
    // 如果使用VC.tabBarItem的话会失效
    // 设置tabBarItem时, 数组中放的谁就去用谁设置
    // 设置标题
    navigation.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"新闻" image:nil tag:11];
    vc1.navigationItem.title = @"News";
    [tabBar setViewControllers:@[navigation]];
    _window.rootViewController = tabBar;
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end
